This code performs the following tasks: 1. `df['PRCP']`: ...

This code performs the following tasks:

1. df['PRCP']:

   • Accesses the column 'PRCP' in the DataFrame df. Presumably, this column contains precipitation data.

2. .resample('A'):

   • Resamples the data to an annual frequency ('A' stands for end-of-year). This assumes that the index of the DataFrame df is a datetime index. Resampling effectively groups the data by each year.

3. .sum():

   • Calculates the sum of the 'PRCP' values for each year (after resampling).

Overall:

This code computes the total annual precipitation (sum of 'PRCP') for each year in the DataFrame. The result will be a new time series indexed by the end of each year with the total precipitation for that year.